SAN DIEGO — What is the insanely productive state of Alex Morgan’s game, a goal-scoring avalanche in the debut season for San Diego Wave FC? How do you explain the absurd level of play at 33, as she shreds defenders like a spry 20-something? Start here: She’s running out of body parts. In the U.S. national team’s run to the CONCACAF title in July, Morgan buried the championship-cinching penalty kick against Wave goalkeeper Kailen Sheridan of Canada. The stunner, though, came earlier versus Haiti on an utterly ridiculous, sideways, side-footed goal — believed to be a career first — that defied …